212513243 has 4 divisors (see below), whose sum is σ = 225014040. Its totient is φ = 200012448.

The previous prime is 212513219. The next prime is 212513269. The reversal of 212513243 is 342315212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212513243 - 2¹² = 212509147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212513143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6250373 + ... + 6250406.

It is an arithmetic number, because the mean of its divisors is an integer number (56253510).

Almost surely, 2^212513243 is an apocalyptic number.

212513243 is a deficient number, since it is larger than the sum of its proper divisors (12500797).

212513243 is a wasteful number, since it uses less digits than its factorization.

212513243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12500796.

The product of its digits is 1440, while the sum is 23.

The square root of 212513243 is about 14577.8339611892. The cubic root of 212513243 is about 596.7539920183.

Adding to 212513243 its reverse (342315212), we get a palindrome (554828455).

The spelling of 212513243 in words is "two hundred twelve million, five hundred thirteen thousand, two hundred forty-three".